3,5-Dinitrophthalic acid CAS 4277-02-5
| CAS No. | 4277-02-5 |
| Molecular Formula | C8H4N2O8 |
| Molecular Weight | 256.13 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of 3,5-Dinitrophthalic acid (C8H4N2O8) is characterized by a carbohydrate-derived structure, an amide group. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
3,5-Dinitrophthalic acid (CAS 4277-02-5), molecular formula C8H4N2O8 and molecular weight 256.13 g/mol, is a CATO reference standard with documented purity and traceability.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C8H4N2O8 |
| Molecular Weight | 256.13 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 2 |
Recommended Standards
- 3,5-Difluoro-4-(2,2,2-trifluoroethoxy)benzoic acid (CAS 801303-45-7)
- 3,6-dinitro phthalic acid (CAS 2300-16-5)
- 2-Chloro-3-(2-chloroethyl)-6-methoxyquinoline (CAS 887581-15-9)
- 4-(Perfluoroethoxy)benzoic acid (CAS 79865-59-1)
- 1-Oxo-1-phenylpropan-2-yl 6-bromo-2-(4-chlorophenyl)quinoline-4-carboxylate (CAS 355421-54-4)
- 3-Amino-2,5-dihydro-1,2,4-triazin-5-one (CAS 1121-90-0)
- 4-Chloro-5-fluoro-2-hydroxybenzaldehyde (CAS 1205551-36-5)
- 2-(Dimethylamino)naphtho[2,3-b]furan-4,9-dione (CAS 210117-62-7)
- 5-Bromo-6-iodoquinoxaline (CAS 1865584-97-9)
- N-(3-Chloroquinoxalin-2-yl)-2-cyanoacetamide (CAS 554404-06-7)
- 1-{5-methyl-[1,2,4]triazolo[1,5-a]pyrimidin-7-yl}piperazine dihydrochloride (CAS 1221726-01-7)
- 3-Bromo-5-(trifluoromethyl)phenylacetic acid (CAS 1161362-01-1)
- Benzyl phenethylcarbamate (CAS 70867-38-8)
- Semaglutide impurity 200 (CAS CATO-C4X-2226200)
Why CATO?
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